Name
xs:duration
Synopsis
The xs:duration
type represents a length of time such as 15
minutes; 2 hours; or 3 years, 7 months, 2 days, 8 hours, 32
minutes, and 12 seconds. It does not have a specific beginning or
end, just a length. Durations are represented using the ISO-8601
standard format P
n Y
n M
n DT
n H
n M
n S.
n Y
gives the number of years, n M the number of months,
n D
the number of days, n H the number of hours,
n M
the number of minutes, and n S the number of seconds. The number of
years, months, days, hours, minutes, and seconds are all given as
nonnegative integers. The number of seconds is a decimal number
with as many places after the decimal point as necessary. For
example, in this format, 3 years, 7 months, 2 days, 8 hours, 32
minutes, and 12 seconds is written as P3Y7M2DT8H32M12S. Any values that are
zero can be omitted. Thus, a duration of 2 years and 2 minutes can
be written as P2YT2M. If there
are no hours, minutes, or seconds, then the T is omitted. Thus, a duration of two
years is written as P2Y. A
leading minus sign before the P
indicates a negative duration.
Constraining facets that apply to xs:duration are minInclusive, maxInclusive, minExclusive, maxExclusive, pattern, enumeration, and whiteSpace. However, because the number
of days in a month varies from 28 to 31 and the number of days in
a year varies from 365 to 366, durations are not always perfectly
ordered. For instance, whether P1M is greater than, equal to, or less
than P30D depends on which month ...
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